package com.ning.springcloud.controller;

import com.ning.springcloud.entities.CommonResult;
import com.ning.springcloud.entities.Payment;
import com.ning.springcloud.lb.LoadBalancer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

@RestController
@Slf4j
public class OrderController {
    //public static final String PAYMENT_URL = "http://localhost:8001";单机版
    public static final String PAYMENT_URL = "http://CLOUD-PAYMENT-SERVICE";//集群版

    @Resource
    private RestTemplate restTemplate;

    @Resource
    private LoadBalancer loadBalancer;

    @Resource
    private DiscoveryClient discoveryClient;

    @GetMapping("/consumer/payment/create")
    public CommonResult<Payment> create(Payment payment){
        return restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment,CommonResult.class);
    }
    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id")Long id){
        return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
    }
    @GetMapping("/consumer/payment/getForEntity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id")Long id){
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_URL + "/payment/get/" + id, CommonResult.class);
        if (entity.getStatusCode().is2xxSuccessful()) {
            return entity.getBody();
        }else{
            return new CommonResult<>(444,"操作失败");
        }
    }
    @GetMapping("/consumer/payment/getPostEntity/create")
    public CommonResult<Payment> create2(Payment payment){
        ResponseEntity<CommonResult> entity = restTemplate.postForEntity(PAYMENT_URL + "/payment/create", payment, CommonResult.class);

        return entity.getBody();
    }

    @GetMapping("/consumer/payment/lb")
    public String getPaymentLB(){
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");

        if (instances ==null || instances.size() <=0) {
            return null;
        }

        ServiceInstance serviceInstance = loadBalancer.instances(instances);

        URI uri = serviceInstance.getUri();

        return restTemplate.getForObject(uri+"/payment/lb",String.class);
    }
    // ====================> zipkin+sleuth
    @GetMapping("/consumer/payment/zipkin")
    public String paymentZipkin() {
        String result = restTemplate.getForObject("http://localhost:8001" + "/payment/zipkin/", String.class);
        return result;
    }
}
